Paper-bag machine.



G. S. JACKSON. PAPERBAG MACHINE.

APPLICATION FILED ULY 1, 1905.

Patented Feb. "2, 1911.

5 SHEETSr-SHEET 1.

G. S.- JACKSON. PAPER BAG 11110111113. APlfLIC'IiION FILED JULY 1, 1907.

Pat ented F917, 1911.

'5 SHEETS-SEEET s. v

- 0. s. JACKSON.

I PAPER BAG MACHINE A'PPLIOATION- FILED JULY 1,1907,

Patented Feb17, 1911.

5 SHEETS-SHEET 4.

li\l 11 1 1 1 k1 11 {1 1 1 1 .1 1 If cfis. JACKSON. PAPER BAG MACHINE.A.PBL-I0-ATION EILED JULY 1, 1907.

983,825. v PatntifFeb.7,l9ll.

v JwG/ZZZ P UNITED STATES- PATENT CHARLES-S. JACKSON, or FRANKLIN, OHIO,Assieuon 'ro'rnn has i commmr, or mnnmrown, OHIO, .A oonronarron promo.

I To all uifioin it may concern: I

Be itknown that I, CHARLES S. J AoKs'oN, a citizen of, the UnitedStates, residing at Franklin, in the county of lVarren and S tate ofOhio, have invented a certain new and useful Improvement in Paper-BagMachines, of which the following is adescription, reference being had totheaccompany- 'ing drawings, forming part of this specification. p

My invention relates to machines for forming what are known as squaresatchel- :bottomed bags, sometimes called self-openin square or S. O. S.bags, and it has for its ob ect the simplification and improvement oftheimechanism employed in such machines for forming the diamond-foldupon the bag blanks in the operation of forming -the bottoms of thebags.

In thepractical embodiment which I have made of my invention '1haveapplied it to aper. bag machines constructed under and insubstantial accordance with Letters Patent ofthe United States No. 736,673 granted August 18, 1903, to Phineas L. Bartholomew,'and I haveso: illustratedit in the accompanying drawings; but my improvement is aplicable to other-paper bag machines of .the c ass referred to.

In the accompanyingdrawings, Figure 1 is a vertical longitudinal sectionof a portion of apaper bag machine embodying my invention, Fig. 2 anoutline or diagrammatic view, in perspective, of the three up per (pairsof rolls shown'in Fig. 1, the left han pair being-the diamond-formingrolls;

.Figs. 3, 4, 5 and 6 perspective views of said diamond-forming rolls andtheir cooperating devices, showing them in the positions" which theysuccessively occupy in the formation of the diamond fold upon the bottomof the bag blank;-Fig. 7 a top plan view of the lower diamond-formingroll; Fig. 8 a.

longitudinal sectional view of said roll,'ex-

posing the parts within it; Fig. 9 a cross section of said roll upon thedotted line 9-9 the several views.

Specification of Letters Patent.

- Application filed. July 1, 1907. Serial No. 381,629. 1

on forward between the rolls F PAPER-BAG MACHIN The bellow s-foldedat".iii-ri Yakima which the bags are'formed-,,is f 'lded and pasted by theusual or'anysuitable'mecha? nism at the' right of the portion of the maclune shown in Figs. 1 and '2, and fed forp ward between the pairs ofrolls'there shown. The two rear or right-handpairs of rolls B B and C Care feed rolls serving to' advancethe bagto the diamond-formingrrolls DD, and they .are also provided-with cutters and coiiperating recesses bymeans of which (in connection .wlth euttingrolls at theright or in rearof them, but notshown) the bagtube is cut transversely intoseparate bagblanks, the successive blanks being on- 'tirely separated from eachotherwith the exceptlon of a narrow connecting tangas shown in Fig. 2,where theirearend of one blank A is shown connected. by such' tan'g tothe front end of the succeeding blank upon which the diamond. ,foldljis.being formed.

The upper. diamond forriiing Dis provided near its middle with a pair ofprojecting points or pinsaa'which are1adapted to puncture themiddleportion of the end of the upper ply of the bag-tubeA, asjthelatter passes betweentheirolls D, D, and to .carry such upper ply o fthe' bag tube: forward and upward around .the face. of the roll D, asshown in Figs. 2 and 3. 1?he middle portion of the lower 1y of the bagtube is carried forward and I ownward over the face of the lower. roll Db itsconnection with the preceding bag blan A which latter is drawnforward and, downward, from the diamond forming-rolls, by the feed rollsE e E c, Fig. 1, whence the, ba blanks pass The roll E is providedmidway of its length with a short cutting blade which cooperates with, a

- recess in the roll E to sever theconn'ecting tangs of the bag blanksas thelatter pass be-- tween the rolls, and thus to finallyand'completely separate the bags.

The carrying of the upper 'plyof'the bag blank upward and forward'around.theroll D and the carrying of .the 'lowe ply of'the blank forward anddownwarji around the roll D in the manner ,and by'the means explained,serves to open out tliehnouth 'of the bag blanlqpreparatopy to theforming of the diamond fold thereongas shown; 111' Fig. 2. The roll D isprovided with ai pair Figs.- 7 aud8, which grippers, enterbetweenthe-"bellows folds of'the bag blank asthe latter passessbetween therolls D D and grip. the lower-ply of the blanklto the face -.i,) f.the'roll'D, as shownin Fig. .2. These ,1 pers serve to define the lowercorner as s'of'the diamond fold, and to carryv such iiirnersforwa'rd anddownward as the roll D turns." The upper corner folds of the diamondfold are formed bya pair of arms ItI H-ha'nn outwardly bent rear ends,as

"shown in Fig, 2, and those forward ends are secured-to vertical rockshafts .I'I, Figs.

- -3 4 5, a, 10 nd 11, mounted and oper in the manner hereafterdescribed. At

the proper point in the-opening out of the mouth of tie bag blank therear ends of these arms H H are swung outward and up- 'ward and theirlaterally bent ends engage --the opposite sides of the upper ply of thebag blank at points corresponding to the engagement of .the' grippersG'G with-the opposite side'sof the lower ply of the blank, an the twoinstrumentaliticscooperate to straighten out the bellows folds of theopposite" sides of the blank and to form and jdefine the u For thepurpose of dls'engaglng the upper per and lower corners of theldia'm'ondfol ply of the blank "fromlthe plus a a of the .'upper roll 'DI rovide a curved plate J,

6, secured to and depending from a rock shaft K suitably mounted inbearings upon the under side of the cross rod L of the framework of themachine; A

ooiledspring Me'onneeted to an arm N see cured to and depending from theright hand end of the rockshaft K tends to turn the 'latter in adirection to fyieldingly press the as said pins carry the upper ply ofthe bag lower end -ofthe curved late J against the forward face of thewill), The, plate J'is of such widthas to permit it to pass betweenthetwo pins a a upon the roll I), and

blank. upward and forward on the face of said roll, the lowerend of thelate J will pass between said pins and behind the bagblank, as shown inFig. 3, anddisengage the blank from the pins. For the purpose ofsupporting the upper ply of the blank, after .such disengagement of itfrom the pins (1 a,

I provide a second curved plate J secured at its upper rear end to therock shaft K, and bowed outwardly at-its, middle, away from theplate J,and having its lower end bent inwardly toward the lower end of thefinger J, so that when the bag blank is disengaged from the pins (1 (1upon the roll D 'itwill be caught and supported by the lower rearwardlybent end of the plate J, as shown in Figs. 4 and 5. The roll D isprovided with. a creasing blade P extending-its full lengthgfiijglifemoperating. with a corresponding groove P m the; roll 1), Figs1 and 7, to form the for the purp swinging the lower end. of the plateorward, away from the roll D,'so as to permit the passage oftheereasingblade Pbehind it, asthe latter'moves from the position of Fig. 5 to'thatof Fig. 6,- I provide'a earn 0 upon the spindle of the roll 'D, whichcam cod Jerates with an anti-' friction roller carried. 'y the lowerendof the arm N toswin the,latter -and-the lower end of the plateforward at the -proper time to permit the creasing blade P to passbehind the plate J, Figs' 1, 3, 4, 5 and (3.-

The lower rollgD is longer than the upper roll D, and its middleportion, corresponding in length to the upper roll D and to the :widtliofthe. bag blank, is of the same diam-- eter as the. upper roll- D,wliileits end -portions are, of slightly larger diameter. asclearly-shown in Figs. 7 and- 8. The bag, blank passes between the tworolls in the lower roll and is not gripped by theb'odieis 'of the roll.I 7

. In rear of the longitudinal line ,of the groo'vel the roll 'D isprovided with a pair of reciprocating plates or fingers Q, Q, Figs. '1,7 and 8.- These plates or fingers are sev cured at their outer ends tothe ends of arms or posts R'R, whichlatter are fastened at their innerends-to sleeves or hubs S S loosely mounted upon the spindle Tot theroll I) and projeetin a radially outward from said sleeves orhn sthrough diagonal -cam slots U U in the shell of the roll D}, Figs. '7and Thespindle of the roll I) is fixed, and tie .roll turns uponit, andthe spindle has fast upon it, immediately within ,the ends of the roll,a pair ofjcams V V. Goiled springs V; W surrounding the spinupon thearfns R R to bear. against the faces circumferential recess thus formedin the die '1 bear against the innerrends' of the they are carriedaround withsaid roll in the revolutions of the latter, their hubs S STfi; and, in-

turning upon the fixed spindle as nuchasthe camsV. V are in Xed pos1-hea the anti-friction rollers Xv-X of v witzhjthe .resultthat thefingers Q cams V' during the forward revolutio'n of .the roll I), thehubs S S which carry the. arms R R will be-forced inward along thespindle T, toward the middle of the roll D o W111 be fmovtid diagonallyinward and forward from The adparts are of the dotted lines.

justinent and cooperation of the such that after the main transversecrease I I has been formed in the bag-blank by the creasing blade Pcarriedby the upper roll D and the groove P the lower roll D and as thefingers Q diametrically between the axes of the rolls D- with two shortcreasing that of the dotted D D the rollers will contact fingers Q. Qwill ward upon the face of the roll D from the position of the solidlines in Fig. 7 tothat 'of the dotted lines in said figure, as therollers X X ride over the faces of the cams -V V. Inasmuch as the endportions of the roll D are of larger diameter than its mid dle portion,and inasmuch as the bag blank travels in the circumferential recess ofsuch reduced middle portion, the fingers Q Q, at their inward andforward movement from the position of the solid lines in Fig. 7 tolines, pass over or above both plies of the bag blank, and'while servingto hold the latter to the roll D in the forward and downward movement ofthe fingers, leave it in loosely collapsed condition, instead ofgripping it tightly to the roll. I provide the opposite ends of therollblades P in rear of the blade P, which serve to hold the bag blank downto theroll D at the initial inward movement of the fingers Q Q, andthereby insure the passage of the latter over the top of both plies ofthe blank.

The fingers Q Q are moved gradually inward and forward over the top ofthe bag X X carried by the arms with the cams V, V, and the blank, bythe action of'the cams V V and the revolution of the roll, as thefingers are carried forward from thediametrical line of the two rolls toapproximately the horizontal plane of the axis of the lower roll, bywhich time, or shortly before reaching such position, they have beenmoved inward and forward to their limit of movement, and the lowerforward edges of the fingers reach -a position approximately coincidentwith the rear edge of the groove P in the roll D (dotted lines Fig. 7)and engage the bagblank at r the line of its main transverse crease.Shortly after the fingers Q Q have reached this position, and thusengaged the bag blank, the rollers X X clear the rear ends of the cams VV and the springs IV W thereupon throw the fingersQ Q outward andbackward to normal position again. The movement of the fingers Q, Q-issub- R contact with the faces of the I earlier Q are brought to-positionbe forced inward and for Their first engagement with the bag is atapoint. more remote from its mouth than that which the fingers occupywhen the opening operation is being completed. Therefore the bag may bevery readily spread apart at the stages of the opening movement and thefingers reach their ultimate-position by a sliding or smoothing movementface of the bag without creases.

The kicker-arms H H, by. which the upper corners of the diamond fold aredefined and formed, are operated by the means more which lays itperfectly flat particularly illustrated. in Figs. 1, 10 and 11.

he arms are secured at their front ends in hubs clamped uponthe upperends of the vertical rock shafts I I heretofore referred tod Theseshafts I I are hollow or tubular an which are secured at their lowerends in hubs I I fast upon a rock shaft I journaled at its opposite endsin brackets Z upon the framework at opposite sides of the machine, Fig.11. Projecting rearwardly and outwardly from the lower ends of thetubular shafts I I, and in the present instance formed integraltherewith, Figs. lO and 11, is a pair of arms I provided with beveledor-inclined rear ends over the sur-' i which bear against fit and turnupon rods or posts I 1 pins J J carried by and pro ecting upwardlyfrom apair of 'arms'J J 3 which are pivoted at their forward ends to a pair ofhubs J J 4 loosely surrounding the rock shaft I 'and'bolted in fixedposition to the framework of the machine'at J -J Fig. 11. Springs J J,connected to the arms I I near their rear ends, exert an outward pullupon said arms and rear ends in engagement with the pins J 2 J 2 of thearms J 3 J The latter carry at their rear ends a pair of anti-frictionrollers J J which bear against the of cams J J fast upon the spindle Eof the roll E, each cam having a recess formed in it with an. abruptrear wall and an inclined front wall, as shown in Fig. 10. Under thisconstruction and arrangement of the parts, when the cams J turn forwardfrom the position shown in Fig. 10 the rear ends-of the arms J J swingoutward, and the springs J J 6 will swing the ,rear ends of the arms I Iout: ward with them, thereby rocking the tubular shafts ends of thekicker-arms H H carried by the upper ends of said shafts. When theabrupt rear walls in the recesses'of the cams J 8 J contact with therollers J J the parts will be quickly swung inward again to normalposition. 5 g

As before stated, the hubs I P. which.

innerfaces of a pair will be permitted to i I I and swinging outward therear 1.5 ga-genientwith the cam K carry the vertical rods I I andtubular: I rock shafts I I and kicker arms cured upon the horizontalrock shaft 1. Secured to, this rock shaft near its right. 5 hand end,Figs. and 11, is the rear end of a forwardly 'proje ting arm K whichcarries upon its side, ear its forward end, an anti-friction roller K,-which travels upon theiperiphery' of a cam K fast upon the'end 1 of theroll F or 'upon the spindle thereof,- as'indicated by the dotted linesin Fig. 1. -A spring K connected to the frontend of the arm K exerts adownward "pull' upon the latter and-maintains the roller K in en- Theadjust? ment of the parts is .such that as. the cams J 8' J 8 moveforwardfrom the position shown ,in- Fig. '10 (thereby permitting thekickerarms H H to. be'swung outward bythe ac- .20 tion .oftlie'sprin'gsjJ J") the depression in :is carried under theandarrangement of the part iasl'th-e w r 'rply of; the bag blank is carrieddownward and forward uponthe-face of the lower roll D by the sidegrippers G G the cooperation of the curved plate or finger 'J and the.40 kicker-armsI-I H with theupp'er ply of the blank, and the actionofthe fingersQ, Q

upon the body or both. plies. of theiblank" p in rearof its maintransverse crease, causes the blank to assume the successive positionsland shli-pes indicated in Figs. l, 5 and Atfthis 'point in theoperation the diamond fold has been formedupon the-end of the bag blankand the latter has beenbrought to.

.. :-an approximately flat or verticalposition, 59 "whereupon the usualwing folders'or presser.

plates are swung-inward and press the flatten'eddiam'ond fold i'agamstthe ,face of the lower roll D as the bag'blank is drawn on downward bythe rolls F e e E Fig. 1 The I wing folders'Y Y-are operated by'acam Ycarried by theroll C, and'connections Z therefron'i shown in saidfigure'but not necessary; .to be. described, inasmuch as suchwingfolders are common in machines of this 0 character. The finalfolding and pasting of the bottoms of the bags,- after they have. passedthe rolls E E, may be accomplished by the;'u sual or any .suitable meansand forms no part of my present invention. The fingers QQ, operating inthe manner H, are secharacter have a'lsowith any slde grippers upon theupper tholomew short creasing blades 1) at roll. Th'eblocks G G andGt-G'. are prog "thereby force the-free ends of the jaws or described,are, I believe, an entirely novel feature in machines of this.character, and. their employment enables. .me to dispense with thecumbersome reciprocating tuckerplates Wlth which some machines of thisbefore been provided, and

roll D, such, for instance, as were necessary and employ'edin themachine of the Barpatent heretofore 1 referred. to.

I provide the-roll B, Fig. '1, with two its opposite ends, and the rollB with two' coincident grooves 7), for the purpose of creasing the bagblank atv the lines ofitsi opposite bottom folds.

These creases serve to break the paper along.- the lines between thelower corner folds of the bag bottom, 'orrned,by the side grippers G G,and the upper corner-folds,formed by the kicker-arms H, and. facilitatethe opening out of the bottom ofthe bag blank into the diamond fold bythese instrumentalities,

The particular-construction of the side grippers G G of the lower-roll Dforms no partof my present invention, and 'theymay be of any suitableconstruction, such, for instance, as that illustrated and described'inthe Bartholomew patent, As shown in Fig. 8, they consist in the presentinstance. of re-' ciprocating j aws- G carried by blocks G G and playingand guided slots in-tlieshell ofqthe roll, Fig. 7. The blocks GT'G arefast upon rods Gr G, whose inner ends have secured to them,bloclrs'Gr Gwhich 'carry anti-friction rollers G G which-e0:-

operate with a' double faced cam G carried bya hub Gr? fast upon thespindle T of the vided with flanges which fit under guide strips G "GFig. 9, and serve to guide the arts in ,their inward and outward move--ments lon itudinally of the rollQ Springpressed .rods G bearing againstthejaws G G -pressthe latter inward. and cooperate with t'he cams G G ingivingthe'jawsG G their nward and outward. movements.

" The gripping jaws of the gri'ppersG G cooperate-with the--gripping awsor fingers-G G, which latter are provided with-beveled ends adapted te-contact with the beveled inner edges of the- 'grippers G G when thelatter are vforced inward by their springs, to

outward into contact with fingers G". G

of the the inner faces of the igripping'jaws "grippers: G G .to grip thelower plies :of the bellows folded blank between them, in very much thesame manner'as the-corresponding partsoperate in the machine of the-Baretholomew patent before 7 mentioned. The adjustment-and cooperation ofthe parts are such that the grippers G T are forced inward, toward themiddle of the roll, to the lower plies of the bag blank, lwhe revolutionof thelatter to force sald arms gripg rs are approximately at the top ofthe ter, and they to approximately the loosely mounted at ing-inwardlytoward roll 1n the forward revolution of the latcontinue to grip thelower plies of the blank-t0 said roll until the latter has turnedforwardapproximately a quarter of a revolution, to the position shown inFig. 1, at which point the cams G G force the grippers G G outward andmaintain the-1n in outward position until, in the further revolution ofthe roll D they are again brought top of the roll. 7 Having thus ,fullydescribed my invention, I claim:

1. In a paper bag machine ofthe character described, the combination,with the lower diamondforming roll mounted to turnupon a fixed" spindle,of a pair of arms said spindle within the roll outward through cam slotsor openings in the shell of the roll, plates or fingers secured to theouter ends of said arms and projectthe middle line of the roll, apair.of cams secured upon the fixed spindle within-the roll andoperating in the and projecting inward toward the middle of the roll,and springs operating to yieldingly maintain said arms in and returnthem to their outer 2. In a aper bag machine of the character 'descried, the combination, with the lower diamond-forming roll mounted to turnupon' a relatively fixed spindle, of a.

pair of arms loosely mounted at their inner ends upon said spindlewithin the roll and projecting outward through cam slots in the I "shellofthe roll, said slots extending for- Wardly and inwardly toward themiddle line of said roll, plates or fingers secured to'the outer end ofsaid arms and projecting inwardly toward the'middle of the roll, a pairof cams secured to the fixed spindle within the roll and coiiperatingwith said, arms,

and springs operating to press said arms in a" direction opposite tothat :in which they respect to.the axis of'the roll whereby theare movedby engagement with the cams.

3. In a paper bag machine of the character described, the combinationwith the lower diamond forming-roll, of a pair of plates or fingerscarried by said roll, each plate or finger having a working edgesubstantially parallel to the axis of the roll, means for advancingbodily on the face of the roll while preserving the direction of theworking edge with fingers will first engage the blank and then carryforward the line of engagement.

4. In a paper bag machine of the character described, the combinationwith the lower diamond forming-roll, of a pair of plates or fingerscarried by said roll, means for advancing them bodily forward and inwardto first engage the blank and then their inner ends upon said plates orfingers carry forward the line of engagement while preserving thedirection of the working edge of each finger. j I 5. In a paper bagmachine of the character described, the combination with the lowerdiamond forming roll, ofa pair of plates or fingers carried thereby,means for advancing said plates or fingers in a dIIGC- tion inclined tothe edge of the roll, while preserving the direction of the working edgethereof. a 6. In a paper bag machine of the character described, thecombination, with the lower diamond-forming ,roll D mounted upon thefixed spindle T, the sleeves or hubs S S loosely mounted upon saidspindle within the roll, the arms R R carried by said sleeves andprojecting outward through the diagonal slots U U in the shellof theroll, the fingers Q- Q, secured to the outer ends of the-arms R R, thecams V V secured to the spindle .T within the rolland cooperatmg withthe arms R R, and the springs WY cooperating with the sleeves S S inopposition to the cams V V. v i .90 7.'In.a paper bag machine ofthecharace I ,ter described, the combination, with the upper diamondforming roll D providedwith -the creasing bladeP, and the lower diamondforming roll D provided with the groove P cooperating with the blade Pto foilifi the main transverse crease in the bag bla of the plates orfingers Q Q carried by the roll D in rear of the groove P and means formoving said fingers inward and forward upon the face of said roll toapproximately the rear line of said groove for the purpose of engagingsaid fingers with the bag blank in rear of the main transverse creasetherein S. In a paper bag machine of the-character described, thecombination, with the diamond-forming rolls and their gripping devices,of the rock shafts I I, the springoperated arms 1"- I projecting fromsaid shafts I I, the arms J 3 J 3 provided with the 7 pins J 2 J 2engaging the arms I I and carrying the anti-frict1on rollers J 7 J thecams J"- J 8 cooperating with said rollers, and the kicker-arms H Hcarried by the upper ends 5 of the rock shafts I I.

9. In a paper bag machine of the character described, the combination,'with the dialmond-forming rolls and their gripping devices, of the rockshaft I and means for rocking it, the vertical rock shaftsI I mount- .edat their lower ends upon the rock shaft I and'carrying the rearwardlyextending. kicker-arms H H at their upper ends, the. spring operatedarms I I projecting from the rock shafts I I, the arms J J provided withthe pins J 2 J cngag-ingthe arms I I and carrying the anti-frictionrollers J J and the cams J J cooperating with the rollers J J 13o duringthe formation of the diamond fold, 105

\ vcal posts 1 I -;to said rock shaft 1 the tubular rockshafts '31" Iprojecting 10. In a'paper bag machine of the character described, thecombination of the oak shaft and means for rocking'it, the v rtisecuredattheir lower ends [I1 1 mounted upon the posts I I the arms from theroolr'shafts I- I,

the springs J J 6 connected to the arms I I,

the arms J? J 3 having the'pi nsJ J engaging the arms I I"; and carryingthe rollers J J, the cams. J d coopera ing with the rollel's, J J andthe kicker-arms H H carried by the. upperends of the rock hafts I I.

;--11.-'In a paper bag machine of the char acter described, thecombination;- with the I upper diamond-forming roll D and itspins 'a aand creasler blade P, of the rock shaft- K, the depending finger J'carried'by said rock shaft, and the'cain O for operating the rock shaft.K to swing-the -lower end of the finger. J forward out. of ythepathof-the creaser blade P. .12. In a paper apter described, thecombination, withthe bag machine of upper diamond-formin roll. D anditsp ns 1 a and qreaser blade l of the rock shaft K, the depending finger Jand,.-the outwardly bowed plate or finger J carriedb'ysaid rockshaft,and the cam'O and connections for operating'the rock shaft toswing the'lower ends of said fingers forward to carry the finger J outofthe'path of the creaser P.-

13.1111 a paper-bag machine of-tl ie char- 'acter described, the"combination with de- Y 'vic'es for openingout the mouth of the bag inincluding diamond formin blank and forming rolls,' and fingers bodily"forwardly slidab e over the periphery in. place, of means and lowercorners-of the opposite sides of the-lower of crating and connectionsplates o the diamond fold thei'eblankiri rear-of ofjthe lower diamondforming roll to hold said" bag blank y.f0r. "creasingthe opposite sidesof the bag blank on the lines which connect the upper mond fold, su

the diamond fold, to facilitate the formation of the latter.

14. In a paper bag machine of the character described, the combinationwith de vices for opening out the month of the bag blankand forming thediamond fold therein including diamond forming rolls and-holding fingersQ,- Q, bodil slidableforwardly on 1 said diamond forming rolls,

and means for advancingthe fingers, of a Y pair of rplls, as B, Bprovided with a creasing blade b and cooperating groove 6 opto' creasethe bag blank on the-lines which connect the upper and lower corners 15.In a paper bag-machine of the character described, the combination withthe lower diamondaforming' roll, of a pair of plates slidably mounted ininclined grooves -there-' 1 in, and'mea-ns for movi'ngsaidplates orfinthe charof the opposite sides of the diamond fold, -to facilitate theformation of the latter, a

o fingers carried :by'said roll and:

gers inward and forward over the face of blank'in rear ofthe maintransverse crease therein, during mo'nd'fold, substantially as(lesdribed.

' 16. In -a'p'aper bag machine ofthe char-- acterdescribed, thecombination, witi lower diamond formin fingers carri d by said roll andmounted therein, and "cams 'a'rsald roll,'"and operating; in

the

the formation of the diarol, ofa pair of said roll, and engagingthemwith the bag the roll, to.bod1ly ad'vance ers' inward and forward

